Water pressure-assisted gold nanoparticle synthesis via pulsed laser ablation in liquid: A simple approach to controlling size distribution

Abstract

This study investigated the impact of applying water pressure on gold nanoparticle (Au NP) synthesis via pulsed laser ablation in liquid (PLAL). The method of applying pressure used is a syringe and a G-clamp and does not require expensive equipment. Field Emission Scanning Electron Microscopy (FESEM) results indicate that pressure enhances NP growth and broadens size distribution. Ultraviolet-visible (UV-Vis) spectroscopy revealed a correlation between pressure and Localized Surface Plasmonic Resonance (LSPR) peak broadening, further supporting size distribution findings. The application of pressure results in smaller cavitation bubbles which encourage rapid Au NP nucleation and growth.